Yes, the WW2 aspect of RoN counts for it. But think of it this way. Imagine you care nothing for Star Wars, but just want a good RTS game. You walk into your favourite games store and see Rise Of Nations and Star Wars Galactic Battlegrounds 2.
"Hmm, RoN is about two years old now. It probably has nothing on SWGB2. Let's see. Hmm, eight ages for RoN. Oh, SWGB2 only has half that..." - this is because you have to cut out all the ages before you get planes because they make no sense - "... Hmm, fewer units in SWGB2 as well. I guess that's because they cut out those other ages. Unique resources, that's an interesting idea, oh wait SWGB2 has less of them too..." - having as many Star Wars based resources as RoN has real-world based resources is impossible - "... gee, it looks like even though SWGB2 is two years newer than RoN, RoN is way better. Well I know where my hard earned cash is going..."
The changes made to AoM would not make SWGB2 look inferior to AoM, as the changes to RoN would.